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PETER PAUL STEPHAN, OF NINVAIIK, NEW' JERSEY.

LOCK ATTACHMENT.

Specification of Letters Patent No. 31,337, dated February 5, 1861.

To @ZZ whom it may concern:

Be it known that I, PETER PAUL Srnrrux, of Newark, in the county of Essex and State of New Jersey, have invented a new and Improved Safety Attachment for Locks; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l is a section of my invention applied to a lock. a', Fig. 2, indicates the plane of section; Fig. 2, a plan or top view of the same; Fig. 3, a section of the same, taken in the line fj, y, Fig. 9. Fig. 4L, a detached view of the key.

Similar letters of reference indicate corresponding parts in the several figures.

The object of this invention is to prevent locks being picked and also to prevent them being unlocked illegitimately by the insertion of keys in the holes.

The invention consists in the employment or use of a novel safety attachment applied to the lock in such a way as to completely till up the key hole and prevent the insertion therein of either picks or keys; the attachment being secured in the key hole by a fastening or supplemental lock attachment hereinafter fully shown and described.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A, Fig. l, represents an ordinary lock applied to a door B, in the usual way.

C, is a spindle, one part of which is made of square or rectangular form to receive washers a, and a bit ZJ; the washers and bit being secured on the spindle C, by a nut c, as shown in Figs. l and 2.' The other part of the spindle C, is of cylindrical form, and it has a projection or lug (Z, extending from it at right angles, said projection or lug having a slot e, extending entirely through it and in line with the spindle C. The lug or projection also has a circular opening f, made through it, said opening being at right angles with the slot c. The spindle C, is allowed to fit in or pass through the key hole g, of the lock and the bit b, is adjusted on the spindle at right. angles with the lug or projection cZ so that when 1the spindle is adjusted in the key hole dle bit foremost into the outer end of the key hole or at the out side of the door 13,) the spindle is turned in the key hole to give the bit an upright position and prevent it being drawn from the keyhole, see Fig. l. The lug or projection (Z, prevents the spin dle being shoved entirely through the kevhole g, the lug or projection being larger than the keyhole. Theibit Z), by means of the washers a, may be adjusted on the spindle to suit doors of varying thicknesses.

D, is a key which is inserted in the slot e, and extends into the front of the key hole g. rIhis key has a hole ZL, made in it which when the key D, is adjusted in the lug and key hole coincides or registers with the hole or opening j?, in the lug or projection CZ.

E is a box or case which is formed with a recess a', to receive the lower part of the lug or projection (Z, and F, is an arbor which passes into the upper part of the box E, and through the openings f, Zt, in the lug and key. The outer end of the arbor F, has a bar .7', attached to it at right angles, and to the lower end of bar j, a rod Z3, is attached at right angles, the arbor F, and rod 7c, being parallel with each other. To the rod Ze, near its outer end, springs Z, are attached, and these springs project out from the rod 7a, near its junction with bar j, as shown clearly in Fig. 3. an aperture m, made in one end of it to receive rod Za, said aperture being below the aperture through which the arbor F, passes. The case or box with its concomitant parts form a supplemental. lock. When the arbor F, is fitted in the box or case E, the springs Z, of rod Za, serve to retain or lock the arbor F, in the box or case, the springs at their outer ends projecting beyond the edges of the opening or aperture m. This will be fully understood by referring to Fig. 3, in which the arbor and bar are shown det-ached from the box or case in red, and shown fitted in the box or case in black.

From the above description it will be seen that when the arbor F, is adjusted in the box or case E, the arbor will pass through the apertures f, and ZL, in the lug cZ, and key I). rIlhe key D, therefore will be prevented from being drawn from the key hole g, lug or projection tZ, and the spindle C, therefore cannot be turned in the lock, and conseg, (which is done by introducing the spinquently not withdrawn from it. In order The box or case E, lhas therefore to Withdraw the arbor F, from the boX or case E, the springs Z, must be compressed in order that they may pass through the aperture m. This is effected by means of a key G, see Fig. 4, Which is composed of a metal plate fn, bent at one end and slotted so that it may be forced Vor shoved over the rod le, and springs Z, the key being inserted in the end of the boX or case opposite to the end Where the rod 7c, is inserted. A person therefore after locking a door inserts the spindle C, in the keyI hole g, turns it so that its bit b, Will be in a Vertical position as described, then inserts the key D, in the lug or projection d, and key hole g, and applies the supplemental lock to the lug or projection d.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. The spindle C, provided With the bit Z1,

and the lug or projection d, in connection` PETER PAUL STEPHAN.

' Witnesses:

C. WV. COWTAN, M. M LIVINGSTON. 

